diff --git a/package.json b/package.json
index 86e93712..c7296855 100644
--- a/package.json
+++ b/package.json
@@ -36,6 +36,7 @@
     "SECURITY.md"
   ],
   "dependencies": {
+    "@types/axios": "^0.14.0",
     "axios": "^1.4.0",
     "typescript": "^5.1.3"
   },
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
new file mode 100644
index 00000000..af607756
--- /dev/null
+++ b/pnpm-lock.yaml
@@ -0,0 +1,97 @@
+lockfileVersion: 5.4
+
+specifiers:
+  '@types/axios': ^0.14.0
+  '@types/node': ^20.3.3
+  axios: ^1.4.0
+  typescript: ^5.1.3
+
+dependencies:
+  '@types/axios': 0.14.0
+  axios: 1.4.0
+  typescript: 5.1.6
+
+devDependencies:
+  '@types/node': 20.4.5
+
+packages:
+
+  /@types/axios/0.14.0:
+    resolution: {integrity: sha512-KqQnQbdYE54D7oa/UmYVMZKq7CO4l8DEENzOKc4aBRwxCXSlJXGz83flFx5L7AWrOQnmuN3kVsRdt+GZPPjiVQ==}
+    deprecated: This is a stub types definition for axios (https://github.com/mzabriskie/axios). axios provides its own type definitions, so you don't need @types/axios installed!
+    dependencies:
+      axios: 1.4.0
+    transitivePeerDependencies:
+      - debug
+    dev: false
+
+  /@types/node/20.4.5:
+    resolution: {integrity: sha512-rt40Nk13II9JwQBdeYqmbn2Q6IVTA5uPhvSO+JVqdXw/6/4glI6oR9ezty/A9Hg5u7JH4OmYmuQ+XvjKm0Datg==}
+    dev: true
+
+  /asynckit/0.4.0:
+    resolution: {integrity: sha512-Oei9OH4tRh0YqU3GxhX79dM/mwVgvbZJaSNaRk+bshkj0S5cfHcgYakreBjrHwatXKbz+IoIdYLxrKim2MjW0Q==}
+    dev: false
+
+  /axios/1.4.0:
+    resolution: {integrity: sha512-S4XCWMEmzvo64T9GfvQDOXgYRDJ/wsSZc7Jvdgx5u1sd0JwsuPLqb3SYmusag+edF6ziyMensPVqLTSc1PiSEA==}
+    dependencies:
+      follow-redirects: 1.15.2
+      form-data: 4.0.0
+      proxy-from-env: 1.1.0
+    transitivePeerDependencies:
+      - debug
+    dev: false
+
+  /combined-stream/1.0.8:
+    resolution: {integrity: sha512-FQN4MRfuJeHf7cBbBMJFXhKSDq+2kAArBlmRBvcvFE5BB1HZKXtSFASDhdlz9zOYwxh8lDdnvmMOe/+5cdoEdg==}
+    engines: {node: '>= 0.8'}
+    dependencies:
+      delayed-stream: 1.0.0
+    dev: false
+
+  /delayed-stream/1.0.0:
+    resolution: {integrity: sha512-ZySD7Nf91aLB0RxL4KGrKHBXl7Eds1DAmEdcoVawXnLD7SDhpNgtuII2aAkg7a7QS41jxPSZ17p4VdGnMHk3MQ==}
+    engines: {node: '>=0.4.0'}
+    dev: false
+
+  /follow-redirects/1.15.2:
+    resolution: {integrity: sha512-VQLG33o04KaQ8uYi2tVNbdrWp1QWxNNea+nmIB4EVM28v0hmP17z7aG1+wAkNzVq4KeXTq3221ye5qTJP91JwA==}
+    engines: {node: '>=4.0'}
+    peerDependencies:
+      debug: '*'
+    peerDependenciesMeta:
+      debug:
+        optional: true
+    dev: false
+
+  /form-data/4.0.0:
+    resolution: {integrity: sha512-ETEklSGi5t0QMZuiXoA/Q6vcnxcLQP5vdugSpuAyi6SVGi2clPPp+xgEhuMaHC+zGgn31Kd235W35f7Hykkaww==}
+    engines: {node: '>= 6'}
+    dependencies:
+      asynckit: 0.4.0
+      combined-stream: 1.0.8
+      mime-types: 2.1.35
+    dev: false
+
+  /mime-db/1.52.0:
+    resolution: {integrity: sha512-sPU4uV7dYlvtWJxwwxHD0PuihVNiE7TyAbQ5SWxDCB9mUYvOgroQOwYQQOKPJ8CIbE+1ETVlOoK1UC2nU3gYvg==}
+    engines: {node: '>= 0.6'}
+    dev: false
+
+  /mime-types/2.1.35:
+    resolution: {integrity: sha512-ZDY+bPm5zTTF+YpCrAU9nK0UgICYPT0QtT1NZWFv4s++TNkcgVaT0g6+4R2uI4MjQjzysHB1zxuWL50hzaeXiw==}
+    engines: {node: '>= 0.6'}
+    dependencies:
+      mime-db: 1.52.0
+    dev: false
+
+  /proxy-from-env/1.1.0:
+    resolution: {integrity: sha512-D+zkORCbA9f1tdWRK0RaCR3GPv50cMxcrz4X8k5LTSUD1Dkw47mKJEZQNunItRTkWwgtaUSo1RVFRIG9ZXiFYg==}
+    dev: false
+
+  /typescript/5.1.6:
+    resolution: {integrity: sha512-zaWCozRZ6DLEWAWFrVDz1H6FVXzUSfTy5FUMWsQlU8Ym5JP9eO4xkTIROFCQvhQf61z6O/G6ugw3SgAnvvm+HA==}
+    engines: {node: '>=14.17'}
+    hasBin: true
+    dev: false
diff --git a/src/model.ts b/src/model.ts
index dc0dafcb..860ad8b1 100644
--- a/src/model.ts
+++ b/src/model.ts
@@ -1,4 +1,4 @@
-import axios from "axios";
+import axios, { CreateAxiosDefaults } from "axios";
 import { Result, success, error } from "./result";
 
 /**
@@ -23,6 +23,9 @@ export interface TypeChatLanguageModel {
     complete(prompt: string): Promise<Result<string>>;
 }
 
+interface Options {
+    axiosConfg?: CreateAxiosDefaults
+}
 /**
  * Creates a language model encapsulation of an OpenAI or Azure OpenAI REST API endpoint
  * chosen by environment variables.
@@ -38,18 +41,18 @@ export interface TypeChatLanguageModel {
  * If none of these key variables are defined, an exception is thrown.
  * @returns An instance of `TypeChatLanguageModel`.
  */
-export function createLanguageModel(env: Record<string, string | undefined>): TypeChatLanguageModel {
+export function createLanguageModel(env: Record<string, string | undefined>, options?: Options): TypeChatLanguageModel {
     if (env.OPENAI_API_KEY) {
         const apiKey = env.OPENAI_API_KEY ?? missingEnvironmentVariable("OPENAI_API_KEY");
         const model = env.OPENAI_MODEL ?? missingEnvironmentVariable("OPENAI_MODEL");
         const endPoint = env.OPENAI_ENDPOINT ?? "https://api.openai.com/v1/chat/completions";
         const org = env.OPENAI_ORGANIZATION ?? "";
-        return createOpenAILanguageModel(apiKey, model, endPoint, org);
+        return createOpenAILanguageModel(apiKey, model, endPoint, org, options);
     }
     if (env.AZURE_OPENAI_API_KEY) {
         const apiKey = env.AZURE_OPENAI_API_KEY ?? missingEnvironmentVariable("AZURE_OPENAI_API_KEY");
         const endPoint = env.AZURE_OPENAI_ENDPOINT ?? missingEnvironmentVariable("AZURE_OPENAI_ENDPOINT");
-        return createAzureOpenAILanguageModel(apiKey, endPoint);
+        return createAzureOpenAILanguageModel(apiKey, endPoint, options);
     }
     missingEnvironmentVariable("OPENAI_API_KEY or AZURE_OPENAI_API_KEY");
 }
@@ -62,13 +65,13 @@ export function createLanguageModel(env: Record<string, string | undefined>): Ty
  * @param org The OpenAI organization id.
  * @returns An instance of `TypeChatLanguageModel`.
  */
-export function createOpenAILanguageModel(apiKey: string, model: string, endPoint = "https://api.openai.com/v1/chat/completions", org = ""): TypeChatLanguageModel {
-    return createAxiosLanguageModel(endPoint, {
+export function createOpenAILanguageModel(apiKey: string, model: string, endPoint = "https://api.openai.com/v1/chat/completions", org = "", options: Options = {}): TypeChatLanguageModel {
+    return createAxiosLanguageModel(endPoint, Object.assign({
         headers: {
             Authorization: `Bearer ${apiKey}`,
             "OpenAI-Organization": org
-         }
-    }, { model });
+        },
+    }, options), { model });
 }
 
 /**
@@ -79,8 +82,8 @@ export function createOpenAILanguageModel(apiKey: string, model: string, endPoin
  * @param apiKey The Azure OpenAI API key.
  * @returns An instance of `TypeChatLanguageModel`.
  */
-export function createAzureOpenAILanguageModel(apiKey: string, endPoint: string,): TypeChatLanguageModel {
-    return createAxiosLanguageModel(endPoint, { headers: { "api-key": apiKey } }, {});
+export function createAzureOpenAILanguageModel(apiKey: string, endPoint: string, options: Options = {}): TypeChatLanguageModel {
+    return createAxiosLanguageModel(endPoint, Object.assign({ headers: { "api-key": apiKey } }, options), {});
 }
 
 /**